This issue is quite weird and I have never encountered such an issue before. Everything works normally on my end as per my test. And as you said, all factors like the amount of items, characters of URL path, list view threshold and so on are within the threshold. How long has this issue occurred? Would clear the browser cache help? If using IE, would the issue still persist?
If an Answer is helpful, please click "Accept Answer" and upvote it.
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.